Lantech LGS-2816C-RPS, Руководство пользователя

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C
HAPTER
4
| Configuring the Switch
Configure SNMP

PVID - This PVID range will be 1-4094. Before you set a number x
as PVID, you have to create a Tag-based VLAN with VID x. For
example, if port x receives an untagged packet, the switch will
apply the PVID (assume as VID y) of port x to tag this packet, the
packet then will be forwarded as the tagged packet with VID y.

Role - This is an egress rule of the port. Here you can choose
Access, Trunk or Hybrid. Trunk means the outgoing packets must
carry VLAN tag header. Access means the outgoing packets carry
no VLAN tag header. If packets have double VLAN tags, one will be
dropped and the other will still be left. As to Hybrid, it is similar to
Trunk, and both of them will tag-out. When the port is set to Hybrid,
its packets will be untagged out if the VID of the outgoing packets
with tag is the same as the one in the field of Untag VID of this port.

Untag VID - Valid range is 1~4094. It works only when Role is set
to Hybrid.

Double Tag - Double-tag mode belongs to the tag-based mode,
however, it would treat all frames as the untagged ones, which
means that tag with PVID will be added into all packets. Then,
these packets will be forwarded as Tag-based VLAN. So, the
incoming packets with tag will become the double-tag ones. Scroll
to enable the function and default is Disable.